Into another form and then come back to their normal form?, I dont mean as in transform as they change life stages like butterflies and stuff.

Well, there exist tiny animals living in moss that can DRY OUT COMPLETELY, and then, when water is added to their surroundings, they resuscitate.

For example, it is quite possible that if you took a piece of dried moss from a botanical museum (say, being 100 years old or so), and then added water to it, there would be a lot of these creatures stirring and begin ambling about.

Well, there exist tiny animals living in moss that can DRY OUT COMPLETELY, and then, when water is added to their surroundings, they resuscitate.

For example, it is quite possible that if you took a piece of dried moss from a botanical museum (say, being 100 years old or so), and then added water to it, there would be a lot of these creatures stirring and begin ambling about.

This isn't morphing of course, but quite interesting anyway..

I believe you are thinking of water bears (Tardigrades). They have been revived under the situations you describe.

It really depends on what you will consider "normal" changes in the same body (like the difference in outward geometry between a standing man and the same one curled up in sleep), and what a true "morphing" should entail.

For example, some would say that the human male penis morphs into something quite different than previously when sexual excitation occurs...

I dont want to sound like a broken record but does what I am describing look physically possible even if there are no animals that could come clsoe to doing it on Earth?

There are plenty of examples of animals that alter their forms (to a greater or lesser degree) to suit their environment. I think the trouble is that, since we are used to these changes we don't consider them "morphing".

Morphing by a colloquial definition tends to involve changes that are *not* what we would consider normal - cat to dog, or human to wolf, etc.

I think the answer to your question lies in the subjectivity of your expectations as an observer.

Animals change colour depending on circumstances and season. You could say the Arctic Hare 'morphs' from summer to winter colouring.

Animals grow horns during mating season, then lose them afterwards.

One could argue that an octopus morphs from a large, spread-out, eight-legged bottom-crawler into a streamlined, jet-propelled rocket to escape danger. This is nature's version of a Transformer Robot - but nature doesn't bother with hard corners and sharp angles - just try duplicating what an octopus can do using just metal and hinges - THERE's a Transformer for you...